Quote Originally Posted by Mephibosheth1 View Post
If the dial is an expensive, scientifically calibrated one with the +/- rating on it, maybe.

Most of them are not calibrated properly, so I suppose if you had the time to perform a manual calibration yourself it would work OK...
You're right, that never occurred to me. Of course, I'm no engineer, so I guess I'm sticking to a rough estimate on the cool side of the terrarium.